// mycmd.c
#include <stdio.h>

int Sum(int s, int e)
{
 	int result = 0;
 	for(int i = s; i <= e; i++)
 	{
 		result += i;
 	}
 	return result;
}

int main()
{
 	int start = 1;
 	int end = 100;
 	printf("开始了\n");
 	int n = Sum(start, end);
 	printf("运行中，结果是: [%d-%d]=%d\n", start, end, n);
 	return 0;
}
